<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<label>姓名</label>
<input id="name" type="text" placeholder="姓名..." />
<label>年龄</label>
<input id="age" type="text" placeholder="年龄..." />
<label>地址</label>
<input id="address" type="text" placeholder="地址..." />
</body>
<script src="../../js/jquery-3.4.1.js"></script>
<script>

    $(function () {
        foursInit();
    });

    function foursInit() {
        $('#name').blur(function () {
            $("#age").focus();
        });
    }

</script>
</html>